| 摘要 |
PROBLEM TO BE SOLVED: To provide a direct liquid type writing implement which can enough control the discharge of ink from the pen point side even when an outside air pressure is changed abruptly, or the abrupt change of expansion and contraction of an ink tank is repeated and secure an enough writing supply flow rate during writing. SOLUTION: In the writing implement in which an inter-shaft inside part is partitioned by a partition wall, the sealed ink tank and an ink temporary storage part are formed in the inter-shaft inside part, a pen core is inserted into the partition wall, and the ink discharged through the pen core by the increase of the pressure of the ink tank is stored temporarily in the ink storage part, the pen core is formed slidably in the axial direction, and by press slide from the tip part of the pen core, a valve mechanism which can form a passage for replacing air in the ink tank is installed on the partition wall. |
